Process for decorating glass surfaces and the like.



N0. 829,131. PATENTED AUG. 21, 1906. W. WACHTER.

PROCESS FOR DECORATING GLASS SURFACES AND THE LIKE APPLICATION FILED SEPT. 15. 1905.

UNITED STATES PATENT OFFICE.

VVILHELM WACHTER, OF LElPSIO-VOLKIYIARSDORF, GERMANY, ASSIGNOR TO MAX MAGDEBURG, OF ZEHLENDORF, PRUSSIA, GERMANY.

PROCESS FOR DECORATING GLASS SURFACES AND THE LIKE.

Specification of Letters, Patent.

Patented Aug. 21, i906.

Application filed September 15, 1906. Serial No. 278.599.

To all whom it may concern:

Be it known that I, WILHELM WACHTER, a subject of the King of Saxony, and a resident of 81 Eisenbahnstrasse, Leipsic-Volkmars- :lorf, in the Kingdom of Saxony, German Empire, have invented a new and useful Process forDecorating Glass Surfaces and the Like, of which the followingis an exact specification.

My invention relates to a process for decorating glass surfaces and like surfaces softening when heated to a comparatively low melting temperature. For carrying out this process hitherto an enamel has been applied upon the body, and then the decoration has been applied by means of a transfer-picture and then burned. To burn simultaneously the base and designs has not been possible, because the various parts of the design would flow into each other in the molten enamel.

The novelty of any invention consists therein that a transfer-picture is printed and burned-at such a low temperature that the various picture parts do not run into each other, but nevertheless the parts combine solidly together and with the base. Such a transfer-picture is manufactured as follows: A flux smelting at a relatively low temperature-for example, 300 to 350 centigrade is applied upon a collodion membrane or the like lying on paper and' detachable therefrom. The flux is then powdered with glaze, preferably lead glaze. Upon this glaze layer the design is printed The glaze layer must be rubbed with talc before being printed in order to prevent it from' taking up color at the places where it is not covered by the picture. Printing is carried out by applying the flux and powdering on the colors. In case several colors are used the same are printed successively in the" above-mentioned manner after the previous rint is completely dried. The transferep1cture for example, the bottle-label-is moistened with water and then applied with its collodion surface upon the surface to be decorated and the paper is withdrawn. If now the object thus treated is subjected to a higher temperature till the above-mentioned flux is melted, the same attaches the non-melting glaze and the print applied thereupon to the glass without causing the picture parts to swim. The melting temperature of the flux can almost reach the softening temperature of the glass, because the burning operation takes place immediatelythereafter.

In order to make my invention clear, reference is made to the accompanying drawing, in which in section various layers are illustrated in exaggerated thickness. It designates a the paper, which carries a collodion membrane b, upon which the flux layer 0 is applied. d is the glaze layer, upon which the design e is printed. B A flux, for example, can be used for bottle-glass softening at a temperature of 350, the melting temperature of which is 320 to 350 centigrade, while the glaze melts when heated up to 1,000. The decorationfor example, the bottle-label thus manufactured has a matte surface. In order to impart gloss to the label, a new flux layer may be applied upon the picture layer.

Glass articles which are manufactured by pressing or blowing may be treated by placing the picture in the mold with its picturei surface against the mold and removing the paper before introducing the glass, or the transfer-picture is glued on the mold-wall, to-

gether with the paper, and then the glass is introduced. When burned, the paper is also consumed. In the latter case it is necessary to print the pictur as a reversed image.

Havingthus fully described the'naturc of this invention, whatI desire to secure by Letters Patent of the United States is 2. A transfer-picture for decorating glass surfaces and the like, consisting ofa collodion membrane, a flux layer applied on the'said membrane, a glaze" layer and a flux layer applied on the'pieture for imparting it gloss, substantially as described.

In witness whereof I have hereunto set my hand in the presence of two witnesses.

WILHELM WACHTER. Witnesses HENRY HASPER, WOLDEMAR HAUPT. 

